A 59.0-kg ice skater is moving at 3.99 m/s when she grabs the loose end of a rope, the opposite end of which is tied to a pole. She then moves in a circle of radius 0.840 m around the pole. (a) Determine the magnitude of the force exerted by the horizontal rope on her arms. 1068.32 Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. kN (b) Compare this force with her weight. Frope =

d) At what rate does the cylinder spiñn 2 (8.51). In the amusement park ride shown here, the passengers are against the wall of a cylinder that rotates vertically. The diameter of the cylinder is 16 m. The cylinder rotates once every 4.5 sec. a) Draw a force diagram for a 55-kg passenger at the top of the ride. Show the weight and normal force vectors. b) What is the normal force? How many "g's" will the passenger feel? c) Draw a force diagram for a 55-kg passenger at the bottom of the ride. Show the weight and normal force vectors. ) What is the normal force? How many “g's" will the passenger feel? ation e the ride above is going at the minimum speed for passengers not to fall off. peed, what would the normal force be on a passenger at the top? What would th

A person is pushing a fully loaded 27.50 kg wheelbarrow at constant velocity along a plank that makes an angle a = 37.0° with the horizontal. The load is distributed such that the center of mass of the wheelbarrow is exactly halfway along its length L. What is the magnitude of the total force F, the person must apply so that the wheelbarrow is parallel to that plank? You may neglect the radius of the wheel in your analysis. The gravitational acceleration is g = 9.81 m/s². F =

A 59.0-kg ice skater is moving at 4.07 m/s when she grabs the loose end of a rope, the opposite end of which is tied to a pole. She then moves in a circle of radius 0.810 m around the pole. red (a) Determine the magnitude of the force exerted by the horizontal rope on her arms. kN (b) Compare this force with her weight. Frope %3D W Need Help? Read It

Please answer vertically, not horizontally so that no steps are miscalculated for this problem. A unicorn is standing on a rotating platform so that it can  be admired from every angle. The platform is 5 m in radius and rotates every 8 seconds (otherwise  known as 1/8 of a rotation per second). What coefficient of friction  must the unicorn's hooves have to keep him from slipping over the edge? This answer is not shown correctly on bartleby. Would he need a higher or lower coefficient of friction to stand closer to the center of the rotating platform? Explain.

Consider the pendulum shown in the figure. The pendulum is released at point A, swings through its lowest point at point C, and reaches its turning point at point D. You may ignore the effects of air resistance. Answer the following questions: A В D C (a) Draw the free body diagram when the object is located at point B. (b) On your free-body diagram, draw a circle around the force components that contribute to the centripetal acceleration and draw a square around the force components that contribute to the tangential acceleration. (c) Draw the direction of the total acceleration vector when the object is located at point B.

Consider the woman doing push-ups in the figure. She has a mass of 49.2 kg, and the distance from her feet to her center of mass is 0.96 m, while the distance from her feet to her hands is 1.75m. a. What force in newtons should the woman in the figure exert on the floor with each hand to do a push-up? Assume that she moves up at a constant speed.  b.  The triceps muscle at the back of her upper arm has an effective lever arm of 1.95 cm, and she exerts force on the floor at a horizontal distance of 15.5 cm from the elbow joint. Calculate the magnitude of the force in newtons for each triceps muscle.  c. How much work in joules does she do if her center of mass rises 0.27 m?  d.  What is her useful power output, in watts, if she does 25 pushups in one minute? For the sake of simplicity, ignore any power used by her muscles lowering her body during each pushup.

Mass mj on the horizontal frictionless table of the figure is connected by a string through a hole in the table to a hanging mass m2. With what angular speed w must mị rotate in a circle of radius r if m2 is to remain hanging at rest? Find an expression for w in terms of m1, m2, r, and g. m2 Note that it may not be necessary to use every variable. Use the following table as a reference for each variable: For Use m¡ m_1 m2 m_2 symbolic expression w P Type here to search 100% 5°C @ 4 3 D M